US3100171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming a pre-stressed hollow lined pressure vessel
Assignee: RALPH E LAZARUS
•
Filing: 1958-05-29
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Granted: 1963-08-06
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Ethridge E Hardesty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:59
CPC Classifications
B; B29; B29C; B29C63/00; B64; B64D; B64D37/00; B64D37/02; B64D37/06; B64D37/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
THE METHOD OF FORMING A PRE-STRESSED HOLLOW LINED PRESSURE VESSEL THAT COMPRISES APPLYING TO THE OUTSIDE OF A HOLLOW THIN WALLED FLUID INPERVIOUS METAL LINEAR AN OUTER LAYER OF UNCURED THERMOSETTING MATERIAL EMBEDDED HAVING FILAMENT FORM REINFORCING MATERIAL EMBEDDED THEREIN WOULD FOR MANY TURNS ABOUT THE LINER, HEATING SAID RESINOUS PLASTIC MATERIAL AND THEREBY CURING IT TO A HARDENED POLYMERIZED STATE, APPLYING TO THE INTERIOR OF SAID LINER DURING SAID CURING A FLUID PRESSURE IN EXCESS OF ANY EXTERNAL PRESSURE THEREON IN AN AMOUNT APPROACHING THAT WHICH WOULD STRESS SAID VESSEL TO ITS MAXIMUM SAFE VALUE, THEREBY EXPANDDING SAID LINER AND SAID RESINOUS PLASTIC MATERIAL AND SAID REINFORCING MATERIAL OUTWARDLY SAFE VALUE, PRESSURE DURING SAID CURING, AND THEREBY PRESTRESSING SAID FILAMENT FROM REINFORCING MATERIAL OUTWARDLY BY SAID A HIGH EXPANSIVE FORCE AND TENSION DURING SAID CURING OF THE RESINOUS PLASTIC MATERIAL, AND SUPPORTING SAID VESSEL AT SPACED POINTS DURING SAID CURING WHILE PERMITTING UNRESTRAINED EXPANSION THEREOF.
Claim 2
Independent Claim
156 words
THE METHOD OF FORMING A PRE-STRESSED HOLLOW LINED PRESSURE VESSEL THAT COMPRISES APPLYING TO THE OUTSIDE OF A HOLLOW THIN WALLED FLUID INPERVIOUS METAL LINEAR AN OUTER LAYER OF UNCURED THERMOSETTING MATERIAL EMBEDDED HAVING FILAMENT FORM REINFORCING MATERIAL EMBEDDED THEREIN WOULD FOR MANY TURNS ABOUT THE LINER, HEATING SAID RESINOUS PLASTIC MATERIAL AND THEREBY CURING IT TO A HARDENED POLYMERIZED STATE, APPLYING TO THE INTERIOR OF SAID LINER DURING SAID CURING A FLUID PRESSURE IN EXCESS OF ANY EXTERNAL PRESSURE THEREON IN AN AMOUNT APPROACHING THAT WHICH WOULD STRESS SAID VESSEL TO ITS MAXIMUM SAFE VALUE, THEREBY EXPANDDING SAID LINER AND SAID RESINOUS PLASTIC MATERIAL AND SAID REINFORCING MATERIAL OUTWARDLY SAFE VALUE, PRESSURE DURING SAID CURING, AND THEREBY PRESTRESSING SAID FILAMENT FROM REINFORCING MATERIAL OUTWARDLY BY SAID A HIGH EXPANSIVE FORCE AND TENSION DURING SAID CURING OF THE RESINOUS PLASTIC MATERIAL, AND SUPPORTING SAID VESSEL AT SPACED POINTS DURING SAID CURING WHILE PERMITTING UNRESTRAINED EXPANSION THEREOF.
Claim 3
Dependent Claim
103 words
APPARATUS FOR HEATING AND PESSURIZING A HOLLOW PRESSURE VESSEL COMPRISING: A PLURALITY OF SUPPORT MEANS FOR ENGAGING AND SUPPORTING SPACED PORTONS OF SAID VESSEL, SAID SUPPORT MEANS ENGAGING ONLY A MINOR FRACTION OF THE SURFACE OF SAID VESSEL, LEAVING THE REMAINER THEREOF FREE EXTERNAL RESTRAINT; ONE OF SAID SUPPORTS DEFINING A CONDUIT FOR CONDUCTING FLUID UNDER PRESSURE TO THE INTERIOR OF SAID VESSEL; MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO THE CONDUIT DEFINED BY SAID SUPPORT; AND INDICATING MEANS HAVING A MOTION RESPONSIVE FEELER, ENGAGEABLE WITH AN UNRESTRAINED PORTION OF SAID VESSEL FOR INDICATING THE EXTENT OF EXPANSION THEREOF BY FLUID PRESSURE THEREIN.
Claim 4
Dependent Claim
103 words
APPARATUS FOR HEATING AND PESSURIZING A HOLLOW PRESSURE VESSEL COMPRISING: A PLURALITY OF SUPPORT MEANS FOR ENGAGING AND SUPPORTING SPACED PORTONS OF SAID VESSEL, SAID SUPPORT MEANS ENGAGING ONLY A MINOR FRACTION OF THE SURFACE OF SAID VESSEL, LEAVING THE REMAINER THEREOF FREE EXTERNAL RESTRAINT; ONE OF SAID SUPPORTS DEFINING A CONDUIT FOR CONDUCTING FLUID UNDER PRESSURE TO THE INTERIOR OF SAID VESSEL; MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO THE CONDUIT DEFINED BY SAID SUPPORT; AND INDICATING MEANS HAVING A MOTION RESPONSIVE FEELER, ENGAGEABLE WITH AN UNRESTRAINED PORTION OF SAID VESSEL FOR INDICATING THE EXTENT OF EXPANSION THEREOF BY FLUID PRESSURE THEREIN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |